Get Your Dog Care Questions Answered by Experts
The most common cause of hair loss around the eyes is demodectic mange. This is not a contagious mange but is more from the dog having a weakened immune system.
You should see the vet on Tuesday so that they can scrape the skin and rule this out.
At the appointment, you can also discuss any allergy concerns that you may have but I doubt that is what you are seeing.
Let me know if you still have questions.